I’m not sure, but I believe it is checks and balances
Personally, I do not think so unless they are sharing it with another doctor before the consultation.
By using lands to farm millet, wheat soy beans cucumbers bok choy. The Chinese would use the rivers that run through the plaines to fish, feeder cattle and travel up and down the rivers and boats
When a country is more specialized, it's able to make something or know how to make something better. If two countries are specialized in different areas, they can each trade their advanced goods instead of each country making moderately good products.
